CN116168600A - Manufacturing method of display module, display module and electronic device - Google Patents

Abstract

Embodiments of the present application provide a method for manufacturing a display module, a display module, and electronic equipment. When the display panel is not yet folded, at least one end of the polarizer and the optical adhesive layer facing the bending portion is provided with a fixed surface. The protective colloid is then converted into a fluid state after the display panel is turned over and rotated, so that it can better cover the exposed end of the polarizer and the optical adhesive layer under the action of its own gravity. In this way, without greatly increasing the difficulty of the manufacturing process, the protection of the exposed positions of the polarizer and the optical adhesive layer can be more effectively realized, and the grease resistance of the display module as a whole can be improved.

Description

Manufacturing method of display module, display module and electronic device

technical field

The present application relates to the field of display device manufacturing, in particular, to a method for manufacturing a display module, a display module and electronic equipment.

Background technique

In some display modules, in order to reduce the area of the lower frame of the screen as much as possible and increase the screen ratio, the packaging method of COP (Chip On PI) is adopted, that is, materials such as polyimide (Polyimide, PI) will be used The substrate is divided into the display part, the bonding part, and the bending part connected between the display part and the bonding part, and the integrated circuit chip (Chip) and the bonding area connected with other circuits are set in the bonding part, and passed Folding the kink folds the bonding portion over to the back of the display portion. However, in this type of display module using COF packaging, after the bonding part is folded to the back of the display part, the film layers such as polarizers and optical glue on the display part will be exposed at the end facing the bending part, which will affect the display of the screen. overall anti-grease properties.

Contents of the invention

In order to overcome the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a method for manufacturing a display module, the method comprising:

A display panel is provided, and the display panel includes a display portion, a bonding portion, and a bending portion between the display portion and the bonding portion;

setting a polarizer on one side of the display portion of the display panel;

An optical adhesive layer is arranged on the side of the polarizer away from the display panel;

At least one end of the polarizer and the optical adhesive layer facing the bending part is provided with a protective colloid with a fixed shape on the surface;

A cover plate is arranged on the side of the optical adhesive layer away from the display panel;

bending the bending part so that the bonding part is folded to the side of the display part away from the cover plate;

Rotating the display module so that the end of the polarizer and the optical adhesive layer facing the bending portion faces upward;

converting the protective colloid into a fluid state, so that the protective colloid covers the polarizer and the end of the optical adhesive layer facing the bending portion;

The protective colloid is cured.

In a possible implementation manner, before the step of providing a protective colloid with a fixed shape on the surface at least at the end of the polarizer and the optical adhesive layer facing the bending part, the method further includes:

A bending protection layer is provided on the bending part, and there is a gap between the bending protection layer and the polarizer;

The step of arranging at least a protective colloid with a fixed shape on the surface at the end of the polarizer and the optical adhesive layer facing the bending part includes:

The protective colloid is arranged in the gap between the polarizer and the bent protective layer.

In a possible implementation manner, the step of arranging at least a protective colloid with a fixed shape on the surface at one end of the polarizer and the optical adhesive layer facing the bending part includes:

A fluid protective colloid is provided at the end of the polarizer and the optical adhesive layer facing the bending portion;

The protective colloid is surface-cured, so that the protective colloid forms a surface-cured layer with a fixed shape.

In a possible implementation manner, the protective colloid includes photocurable glue;

The step of surface curing the protective colloid includes:

Light curing is carried out on the surface of the protective colloid.

In a possible implementation, the step of converting the protective colloid into a fluid state includes:

The protective colloid is heated to dissolve the surface solidified layer of the protective colloid.

In a possible implementation manner, the orthographic projection of the polarizer and the optical adhesive layer on the display panel is located within the orthographic projection of the cover plate on the display panel;

In the step of converting the protective colloid into a fluid state, when the protective colloid covers the polarizer and the end of the optical adhesive layer facing the bending part, the protective colloid and the display The panel is in contact with the cover plate.

In a possible implementation manner, when the protective colloid is in a fluid state, the colloid viscosity is 20000cP to 60000cP.

In a possible implementation manner, the material of the protective colloid includes silicone glue, epoxy resin or acrylic glue.

In a possible implementation, after converting the protective colloid into a fluid state, the protective colloid covers the polarizer and the end of the optical adhesive layer facing the bending part under the action of gravity Afterwards, the method also includes:

Conductive glue is arranged on the side of the protective colloid away from the polarizer to form an electrostatic protection layer.

Another object of the present application is to provide a display module, which includes:

A display panel, the display panel includes a display part, a bending part, and a binding part, wherein the display part and the binding part are stacked, and the display part and the binding part pass through the bending part Department connected;

a polarizer, located on the side of the display part away from the bonding part;

an optical adhesive layer located on a side of the polarizer away from the display panel;

a cover plate, located on a side of the optical adhesive layer away from the display panel;

Wherein, one end of the polarizer and the optical adhesive layer facing the bending portion is provided with protective colloid, and the protective colloid is in contact with the polarizer and the optical adhesive layer;

Preferably, the orthographic projection of the polarizer and the optical adhesive layer on the display panel is located within the orthographic projection of the cover plate on the display panel, and the protective colloid is compatible with the display panel, the The polarizer, the optical adhesive layer, and the cover are in contact.

Another object of the present application is to provide an electronic device, which includes the display module provided by itself.

Compared with the prior art, the present application has the following beneficial effects:

Embodiments of the present application provide a method for manufacturing a display module, a display module, and electronic equipment. When the display panel is not yet folded, at least one end of the polarizer and the optical adhesive layer facing the bending portion is provided with a fixed surface. The protective colloid, and then after the display panel is rotated, the protective colloid is converted into a fluid state, so that it can better cover the exposed end of the polarizer and the optical adhesive layer under its own gravity, and at the same time, the protective colloid can be better connected with the cover plate , The display panel is in closer contact, which makes the protective effect of the protective colloid better. In this way, without greatly increasing the difficulty of the manufacturing process, the protection of the exposed positions of the polarizer and the optical adhesive layer can be more effectively realized, and the grease resistance of the display module as a whole can be improved.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings that are required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

FIG. 1 is one of the schematic diagrams of a display module in the prior art;

Fig. 2 is the second schematic diagram of the display module in the prior art;

FIG. 3 is a flow chart of the steps of the manufacturing method of the display module provided by this embodiment;

FIG. 4 is one of the schematic diagrams of the manufacturing process of the display module provided in this embodiment;

FIG. 5 is the second schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 6 is the third schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 7 is the fourth schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 8 is the fifth schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 9 is the sixth schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 10 is the seventh schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 11 is the eighth schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 12 is the ninth schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 13 is the tenth schematic diagram of the manufacturing process of the display module provided by this embodiment;

FIG. 14 is the eleventh schematic diagram of the manufacturing process of the display module provided in this embodiment;

FIG. 15 is the twelveth schematic diagram of the manufacturing process of the display module provided by this embodiment.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer" etc. are based on The orientation or positional relationship shown in the drawings, or the conventional orientation or positional relationship of the invention product in use, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have Certain orientations, constructed and operative in certain orientations, therefore should not be construed as limitations on the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

It should be noted that, in the case of no conflict, different features in the embodiments of the present application may be combined with each other.

Please refer to FIG. 1 and FIG. 2. FIG. 1 and FIG. 2 are schematic diagrams of the unfolded and folded state of the display module adopting the COP package respectively. This type of display module usually includes a display panel 100, a polarizer 200, an optical Adhesive layer 300 , cover plate 400 , bending protection layer 500 , chip 610 and bonding devices, etc.

Wherein, the display panel 100 may include an array substrate, the array substrate may be a flexible substrate, and the display panel 100 may include one or more circuit layers and electronic device layers. The display panel 100 includes a display portion 110 , a bonding portion 120 and a bending portion 130 between the display portion 110 and the bonding portion 120 . In the position shown in FIG. 1 , a polarizer 200 , an optical adhesive layer 300 , and a cover plate 400 may be sequentially arranged on the display portion 110 ; in addition, in a position not shown in FIG. There are multiple film layers such as anode layer, luminescent material layer, and cathode layer in sequence. The polarizer 200 , optical adhesive layer 300 and cover plate 400 can be located on the side of the cathode layer away from the display panel 100 . The bending protection layer 500 is disposed on the bending portion 130 , and the chip 610 and the bonding device 620 are disposed on the bonding portion.

Please refer to FIG. 2 again. In some COP-packaged display modules, the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 may not be covered (the position shown by the elliptical dotted circle in FIG. 2 ), resulting in this position Poor grease resistance. At the same time, since the cover plate 400 not only covers the display portion 110, but also extends to cover at least part of the bending portion 130, the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 has a small working space, and the existing technology is difficult to This position is provided with a grease-resistant protective structure.

In view of this, this embodiment provides a solution for effectively improving the grease resistance of the display module, and the solution provided by this embodiment will be described in detail below.

Please refer to FIG. 3 . FIG. 3 is a method for manufacturing a display module provided in this embodiment, and the method may include the following steps.

In step S110 , a display panel 100 is provided, and the display panel 100 includes a display portion 110 , a bonding portion 120 and a bending portion 130 for connecting the display portion 110 and the bonding portion 120 .

In this embodiment, the display panel 100 may include a flexible material supporting substrate, such as a polyimide (Polyimide, PI) substrate. Referring to FIG. 4 , the display panel 100 includes a display portion 110 , a bonding portion 120 and a bending portion 130 between the display portion 110 and the bonding portion 120 .

Optionally, in this embodiment, the display panel 100 may include a substrate of a TFT (Thin Film Transistor, thin film transistor) array. In positions not shown in FIG. 4 , the display panel 100 may include a flexible substrate, a buffer layer, a source metal, a drain metal, a semiconductor active layer, a gate insulating layer, a first metal layer, a capacitor dielectric layer, Multiple film layers such as the second metal layer, the first planarization layer, the third metal layer, the second planarization layer, and the fourth metal layer. In the position shown in FIG. 4 , the film layer of the display panel 100 farthest from the flexible substrate may be one of the planarization layers. Of course, it can also be any display panel in the prior art.

Step S120 , disposing a polarizer 200 on one side of the display portion 110 of the display panel 100 .

It should be noted that in this embodiment, only the polarizer 200 located on the display unit 110 is shown at the position shown in FIG. In positions not shown, film layer structures such as an anode layer, a pixel defining layer, a light emitting layer, a cathode layer, and an encapsulation layer are sequentially formed, and then the polarizer 200 is disposed on the encapsulation layer.

Step S130 , disposing an optical glue layer 300 on a side of the polarizer 200 away from the display panel 100 .

In this embodiment, the optical adhesive layer 300 may be a transparent optical adhesive layer 300 .

Step S140 , disposing a protective colloid 700 with at least a fixed shape on the surface at the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 .

Referring to FIG. 5 , in this embodiment, a protective colloid 700 is disposed on the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 , and the shape of the protective colloid 700 has a fixed shape. In a possible implementation manner, at this stage, the protective colloid 700 may be solid as a whole; Wrap the protective glue in a fluid state.

In step S150, a cover plate 400 is provided on the side of the optical adhesive layer 300 away from the display panel 100, and the positive projection of the polarizer 200 and the optical adhesive layer 300 on the display panel 100 is located on the cover. The panel 400 is in orthographic projection on said display panel 100 .

In some possible implementation manners, please refer to FIG. 6 , the cover plate 400 may cover the display portion 110 and extend to cover at least part of the bending portion 130 . Optionally, in this state, the orthographic projection of the protective colloid on the display panel 100 may also be located within the orthographic projection of the cover plate 400 on the display panel 100 .

Step S160 , bending the bending portion 130 to fold the bonding portion 120 to the side of the display portion 110 away from the cover plate 400 .

Step S170 , rotating the display module so that the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 faces upward.

Please refer to FIG. 7 , in this embodiment, after the bonding part 120 is folded to the back of the display part 110, the display module can be rotated so that the polarizer 200 and the optical adhesive layer 300 face the One end of the bent portion 130 faces upward. In this way, the protective colloid is spatially located above the exposed end of the polarizer 200 and the optical adhesive layer 300 . It should be noted that, in this embodiment, the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 can be rotated to be vertically upward, or can be rotated to be obliquely upward at a certain angle.

Step S180 , converting the protective colloid 700 into a fluid state, so that the protective colloid 700 covers the polarizer 200 and the end of the optical adhesive layer 300 facing the bending portion 130 under the action of gravity.

Please refer to FIG. 8 , in a possible implementation manner, after rotating the polarizer 200 and the end of the optical adhesive layer 300 toward the bending portion 130 to vertically upward, the protective colloid 700 is converted into a fluid state, the protective colloid 700 will flow under the action of gravity, so that the protective colloid 700 is in contact with the display panel 100 and the cover plate 400 . For example, make the protective colloid 700 fill the U with the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 as the bottom side, and the cover plate 400 and the display panel 100 as the sides. type space, so as to cover the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 .

Step S190 , performing overall curing on the protective colloid 700 .

In this embodiment, for example, static, air-drying, baking, light-curing, etc. may be used, so that the protective colloid 700 finally maintains the form of covering the polarizer 200 and the edge of the optical adhesive layer 300 .

Based on the above design, when the display panel 100 has not been folded over, at least one end of the polarizer 200 and the optical adhesive layer 300 facing the bending part 130 is provided with a protective colloid 700 with a fixed shape on the surface, and then after the display panel 100 is folded and After rotation, the protective colloid 700 is converted into a fluid state, so that it can better cover the exposed end of the polarizer 200 and the optical adhesive layer 300 under its own gravity, and at the same time, the protective colloid 700 can be better connected with the cover plate 400 and the display The closer contact between the panels 100 makes the protective effect of the protective colloid 700 better. In this way, the protection of the exposed positions of the polarizer 200 and the optical adhesive layer 300 can be more effectively realized without greatly increasing the difficulty of the manufacturing process, and the grease resistance of the display module as a whole can be improved.

Among them, by setting the protective adhesive layer with a relatively fixed shape first, and then converting it into a fluid state after rotation, the setting process of the protective adhesive layer can be more controllable, and the fault tolerance rate of the manufacturing process can be improved, and The protective adhesive layer provided by the method provided in this embodiment can cover the edges of the polarizer 200 and the optical adhesive layer 300 relatively comprehensively, preventing the intrusion of anti-grease.

In a possible implementation manner, please refer to FIG. 9 , before step S140, a bending protection layer 500 may also be provided on the bending portion 130, and the bending protection layer 500 and the polarizer 200 with gaps. Preferably, a chip 610 and other bonding devices 620 may also be provided on the bonding portion 120 .

Then please refer to FIG. 10 , in step S140 , the protective colloid 700 may be disposed in the gap between the polarizer 200 and the bent protective layer 500 . Referring to FIG. 11 , after the cover plate 400 is installed in step S150 , the orthographic projection of the cover plate 400 on the display portion 110 covers the orthographic projection of the protective colloid 400 on the display portion. Please refer to FIG. 12 and FIG. 13 , after the display panel 100 is bent, rotated and melted with the protective colloid 700 in steps S170 and S180, a part of the protective colloid can be located on the polarizer 200 and the optical glue Between one end of the layer 300 facing the bending portion 130 and the bending protection layer 500 . Preferably, referring to FIG. 13 , the melted protective colloid 700 is in contact with the protective layer 500 and subsequently cured, so as to provide better protection.

In this way, since the protective colloid 700 provided in step S140 has a relatively fixed form and is located between the polarizer 200 and the bent protective layer 500, after melting the protective colloid 700 in S180, the protective colloid 700 There will not be too much interference with the bending protection layer 500, so as to avoid the subsequent bending of the bending part 130 or when the bending part 130 is hit, the force of the bending protection layer 500 is transmitted to the The protective colloid 700 affects the polarizer 200 and the optical adhesive layer 300 .

In a possible implementation manner, in step S140 , a fluid protective colloid 700 may be provided on the end of the polarizer 200 and the optical adhesive layer 300 facing the bending portion 130 . At this stage, the protective colloid 700 can be a high viscosity colloid.

Then, the protective colloid 700 is surface-cured, so that the protective colloid 700 forms a surface-cured layer with a fixed shape.

In this way, in step S140 , it is not necessary to set the entire protective colloid 700 in a solid state, and only a surface solidified layer needs to be formed to ensure that it has a stable contour shape. Then in step S180 , it is only necessary to remove or melt the surface solidified layer to convert the protective colloid 700 into a fluid state as a whole, thereby improving manufacturing efficiency.

Further, in a possible implementation manner, the protective colloid 700 includes photocurable glue. In step S140, after the fluid protective colloid 700 is set, the surface of the protective colloid 700 may be cured by light. Then in step S180, the protective colloid 700 may be heated (for example, baked) to dissolve the surface solidified layer of the protective colloid 700 . Afterwards, the protective colloid 700 may be further heated and baked to be cured by heat, and finally maintain a stable shape covering the edges of the polarizer 200 and the optical colloid.

Further, in a possible implementation manner, the protective colloid 700 can be a viscous colloid, so that when the fluid protective colloid 700 is set in step S140, the colloid can be stacked as high as possible to increase the dispensing amount. Optionally, when the protective colloid 700 is in a fluid state, the colloid viscosity is 20000mPa.s to 60000mPa.s.

In a possible implementation, according to FIG. 15 , after converting the protective colloid 700 into a fluid state, after step S180, the protective colloid 700 can also be kept away from the polarizer 200 and the optical glue. Conductive glue is provided on one side of the layer 300 to form the electrostatic protection layer 800, thereby improving the electrostatic protection effect of the display module.

Optionally, the conductive glue may have high fluidity before volatilization, and the thickness of the electrostatic protection layer formed after volatilization at room temperature may be approximately 0.005 mm. Optionally, the material of the protective colloid 700 includes one or more of silicone glue, epoxy resin or acrylic glue.

This embodiment also provides a display module, which may include a display panel 100 , a polarizer 200 , an optical glue layer 300 , a cover plate 400 and a protective glue 700 .

The display panel 100 includes a display portion 110, a bonding portion 120 and a bending portion 130, wherein the display portion 110 and the bonding portion 120 are stacked, and the display portion 110 and the bonding portion 120 They are connected through the bending portion 130 .

For example, the display part 110, the bending part 130 and the bonding part 120 can be located on the same plane and connected in sequence without bending. After the bending part 130 is bent, the The bonding part 120 is folded to the back of the display part 110 .

The polarizer 200 is located on a side of the display portion 110 away from the bonding portion 120 .

The optical adhesive layer 300 is located on a side of the polarizer 200 away from the display panel 100 .

The cover plate 400 is located on a side of the optical adhesive layer 300 away from the display panel 100 .

One end of the polarizer 200 and the optical glue layer 300 facing the bending portion 130 is provided with a protective glue 700 , and the protective glue 700 is located between the cover plate 400 and the display panel 100 . And the protective colloid 700 is in contact with the polarizer 200 and the optical adhesive layer 300 .

Preferably, the orthographic projection of the polarizer 200 and the optical adhesive layer 300 on the display panel 100 is located within the orthographic projection of the cover plate 400 on the display panel, and the protective colloid 700 and the The display panel 100 , the polarizer 200 , the optical adhesive layer 300 , and the cover plate 400 are in contact.

Wherein, the setting method of the protective colloid 400 can refer to the above-mentioned method provided in this embodiment, which will not be repeated here.

Please refer to FIG. 15 , in addition to the mechanisms mentioned above, the display module provided in this embodiment may also include a back support film on the side of the display part 110 facing the bonding part 120 and the side of the bonding part 120 facing the display part 110 910 and structures such as support blocks for supporting the gap between the display part 110 and the bonding part 120 will not be repeated here.

This embodiment also provides an electronic device, which may include the display module provided by this embodiment.

To sum up, the embodiments of the present application provide a method for manufacturing a display module, a display module, and an electronic device. Before the display panel is folded, at least The surface has a fixed form of protective colloid, and then after the display panel is turned over and rotated, the protective colloid is converted into a fluid state, so that it can better cover the exposed end of the polarizer and the optical adhesive layer under the action of its own gravity, and at the same time The protective colloid can better contact the cover plate and the display panel more closely, so that the protective effect of the protective colloid is better. In this way, without greatly increasing the difficulty of the manufacturing process, the protection of the exposed positions of the polarizer and the optical adhesive layer can be more effectively realized, and the grease resistance of the display module as a whole can be improved.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A method for manufacturing a display module, characterized in that the method comprises: A display panel is provided, the display panel includes a display portion, a bonding portion, and a bending portion for connecting the display portion and the bonding portion; setting a polarizer on one side of the display portion of the display panel; An optical adhesive layer is arranged on the side of the polarizer away from the display panel; At least one end of the polarizer and the optical adhesive layer facing the bending part is provided with a protective colloid with a fixed shape on the surface; A cover plate is arranged on the side of the optical adhesive layer away from the display panel; bending the bending part so that the bonding part is folded to the side of the display part away from the cover plate; Rotating the display module so that the end of the polarizer and the optical adhesive layer facing the bending portion faces upward; converting the protective colloid into a fluid state, so that the protective colloid covers the polarizer and the end of the optical adhesive layer facing the bending portion; The protective colloid is cured. 2. The method according to claim 1, characterized in that, before the step of arranging at least a protective colloid with a fixed shape on the surface at the end of the polarizer and the optical adhesive layer towards the bending portion, the The method also includes: A bending protection layer is provided on the bending part, and there is a gap between the bending protection layer and the polarizer; The step of arranging at least a protective colloid with a fixed shape on the surface at the end of the polarizer and the optical adhesive layer facing the bending part includes: The protective colloid is arranged in the gap between the polarizer and the bent protective layer. 3. The method according to claim 1, wherein the step of arranging at least a protective colloid with a fixed shape on the surface at the end of the polarizer and the optical adhesive layer facing the bending portion comprises: A fluid protective colloid is provided at the end of the polarizer and the optical adhesive layer facing the bending portion; The protective colloid is surface-cured, so that the protective colloid forms a surface-cured layer with a fixed shape. 4. The method according to claim 3, wherein the protective colloid comprises photocurable glue; The step of surface curing the protective colloid includes: Light curing is carried out on the surface of the protective colloid. 5. The method according to claim 4, wherein the step of converting the protective colloid into a fluid state comprises: The protective colloid is heated to dissolve the surface solidified layer of the protective colloid. 6. The method according to claim 5, wherein the orthographic projection of the polarizer and the optical adhesive layer on the display panel is located within the orthographic projection of the cover plate on the display panel; In the step of converting the protective colloid into a fluid state, when the protective colloid covers the polarizer and the end of the optical adhesive layer facing the bending part, the protective colloid and the display The panel is in contact with the cover plate. 7. The method according to claim 6, characterized in that, the colloidal viscosity of the protective colloid is 20000cP to 60000cP; Preferably, the material of the protective colloid includes silicone glue, epoxy resin or acrylic glue. 8. The method according to claim 1, characterized in that, after converting the protective colloid into a fluid state, the protective colloid covers the polarizer and the end of the optical adhesive layer towards the bending portion After the step, the method also includes: Conductive glue is arranged on the side of the protective colloid away from the polarizer to form an electrostatic protection layer. 9. A display module, characterized in that the display module comprises: A display panel, the display panel includes a display portion, a bending portion, and a bonding portion, wherein the display portion and the bonding portion are stacked, and the display portion and the bonding portion pass through the bending Department connected; a polarizer, located on the side of the display part away from the bonding part; an optical adhesive layer located on a side of the polarizer away from the display panel; a cover plate, located on a side of the optical adhesive layer away from the display panel; Wherein, one end of the polarizer and the optical adhesive layer facing the bending portion is provided with protective colloid, and the protective colloid is in contact with the polarizer and the optical adhesive layer; Preferably, the orthographic projection of the polarizer and the optical adhesive layer on the display panel is located within the orthographic projection of the cover plate on the display panel, and the protective colloid is compatible with the display panel, the The polarizer, the optical adhesive layer, and the cover are in contact. 10. An electronic device, characterized in that the electronic device comprises the display module according to claim 9.

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